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Recent questions tagged FORTRAN
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fortran - Function call stopping/hanging when containing a write-statement, but only when linking with certain libraries during compilation
Here is my minimal example: program test implicit none real :: testfunc write(*,*) "Writing from main" write(*, ... just stop linking to them.) See Question&Answers more detail:os...
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fortran - Calling an internal subroutine inside OpenMP region
I have a module that contains a subroutine that contains another subroutine. The outer subroutine has a parallel ... to its child subroutines. See Question&Answers more detail:os...
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fortran - Sourced allocation of a non-contiguous array section
In relation to a recent post regarding how to declare the array shape concisely, I tried the following three ... = (garbage data, reasonable) See Question&Answers more detail:os...
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651
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fortran - Cannot detect file existing or not
In a program I am improving, I noticed that Fortran does not detect file existing or not. This led to a ... Dump file not found' stop endif See Question&Answers more detail:os...
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725
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fortran - Fibonacci numbers becoming negative after a certain term
I wrote this program in Fortran to display the Fibonacci numbers up to the x-th term: program fibonacci ... m using the gfortran compiler. See Question&Answers more detail:os...
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fortran
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868
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fortran - Syntax for openmp long directive list fortran77
PROBLEM : Long list of directives openmp fortran77 c$omp parallel default(shared) private(i,k,i1,i2,i3,i4,i5, ... because I am using fortran77) See Question&Answers more detail:os...
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0
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959
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fortran - Number of lines of a text file
I'm trying to make a function that takes in a file name (i.e. "data.txt") and produces the number of ... when I compile just the wrong output. See Question&Answers more detail:os...
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Oct 24, 2021
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fortran
0
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588
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1
answer
fortran - "DATA INT / 'STRING' /" problem when compiling with gfortran
I have some old (~1995) legacy fortran code which is compiled with g77 compiler and fails on gfortran. The ... this? Thank you in advance. See Question&Answers more detail:os...
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Oct 24, 2021
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fortran
0
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621
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1
answer
fortran - Proper way of doing the systematic computations / initializations at the beginning of a program
I am writing a program that I will use in two main cases: 1D and 2D. The dimension ndim is loaded through ... what would be the proper syntax? See Question&Answers more detail:os...
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Oct 24, 2021
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0
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556
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fortran - sum only on certain dimension
I have a Fortran 90array (matrix) like: REAL(8),DIMENSION(Xmax, Ymax, Zmax, Xmax, Ymax, Zmax) :: Mat ... function? what would be more efficient? See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
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543
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answer
fortran - Meaning of filelocation = "../"//filename
filelocation = "../"//filename PRINT *, "Attempting to open ", TRIM(filename) OPEN(fh1, FILE = filelocation, STATUS= ... /"// in the first line? See Question&Answers more detail:os...
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Oct 24, 2021
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fortran
0
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499
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answer
fortran - Characters in quotes in a print statement
The documentation for the datetime subroutine in fortran-95, gives an example on the usage of data and time. Here ... , in the print statements? See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
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422
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1
answer
fortran - Scoping rules for variable and functions in contained subroutines
I have a problem understanding why a variable (i) declared in a subroutine is seen in a contained subroutine, ... right words). Any explanation? See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
621
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1
answer
fortran - Segfault when calling a function with a constant argument
I have written this very simple code in Fortran: program su implicit none real ran3 write(*,*) ran3(0) end program ... and how I can solve it? See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
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659
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answer
fortran - How can I make gfortran or ifort tell me when it implicitly promotes a REAL(4) to a REAL(8)?
I am tasked with changing the precision of parts of an HPC application, bearing in mind that it makes ... when implicitly promoting a REAL? See Question&Answers more detail:os...
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Oct 24, 2021
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1.2k
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1
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fortran - gfortran error: unexpected element '' in format string at (1)
I have a project written in VS2010 with Intel Visual Fortran. I have a dump subroutine to write a 2D matrix into ... ' in format string at (1) See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
910
views
1
answer
fortran - Function result has no implicit type
Below is a sample code that addresses the problem I am having. The error message I am getting is Function ... do end do end function Sample See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
523
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fortran - Error: If selector expression in SELECT TYPE is not a named variable, associate-name=> shall appear
I am trying to use a type in another type. However, I just cannot make it compile. It is strange to me: ... How can I make this code compile? See Question&Answers more detail:os...
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Technique[技术]
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71.8m
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fortran
0
votes
623
views
1
answer
fortran - OpenMP no threading in subroutine
I'm writing a matrix multiplication subroutine in Fortran. I'm using the Intel Fortran compiler. I've written ... appreciate any inputs on this. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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fortran
0
votes
624
views
1
answer
fortran - Subroutine with array element as argument
In my program subroutine stlstp passing work(2,1) as parameter to stlfts(...) subroutine. work(2,1) will be double ... (x, n, np, trend) end See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
891
views
1
answer
fortran - How to reverse a chain of characters?
I have to create a program that reverses phrases. For example: when I write hello guys, I want syug olleh ... (*,*)nomT end program reversing See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
583
views
1
answer
fortran - Defining a variable that must be declared constant, but changes in a loop
I'm testing out ranges of values (-1:34 just for kicks) for the function selected_real_kind to determine the kind ... t end do end program f1 See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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fortran
0
votes
643
views
1
answer
fortran - Arithmetic involving integer and real operands
In Fortran, will arithmetic involving an integer and real operand be always carried out by converting the integer ... is there any exception? See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
495
views
1
answer
fortran - Concise notation for inheriting size from other array?
In my code, I have a subroutine that takes a 5th-rank array as argument and uses a local variable, which ... the readability more than it helps. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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fortran
0
votes
681
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1
answer
fortran - Operator to check file existence
I want to create an operator .f. that checks whether a file exists so that I can write if (.f ... for having the mentioned functionality? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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fortran
0
votes
528
views
1
answer
fortran - How to construct a matrix containing 9 smaller matrix
I have nine matrices whose dimension as (N by N) A1(i,j),A2(i,j),A3(i,j),A4(i,j),A5(i,j),A6(i,j),A7(i,j), ... ,j),A8(i,j),A9(i,j)] end do end do See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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fortran
0
votes
700
views
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answer
fortran - GFortran and CodeBlocks issue with Modules and Multiple Files
I am working with GFortran and CodeBlocks but I'm having an issue about Modules and Multiple files. i keep getting ... how to solve this issue? See Question&Answers more detail:os...
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71.8m
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fortran
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575
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fortran - ISO_FORTRAN_ENV or -fdefault-real-8 to promote reals to double precision
I've always been using the -fdefault-real-8 option of gfortran to automatically promote every single REAL declared ... changing only that line. See Question&Answers more detail:os...
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